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Cloud system management is complex due to their diversity and frequent runtime changes. Cloud systems were previously managed through cloud specific management tools that focus on optimising technical metrics, such as performance. However, business users care business metrics (such as cost and revenue) more than technical metrics. To address these issues, this paper proposes a unified business-driven...
Cloud computing is an efficient and cost effective realization of the utility function principle. Over the last years, a vast pool of choices for businesses has been created. This diversity of cloud infrastructures, platforms, and tools creates several challenges. In particular, it hinders interoperability, promotes vendor lock-in, but more importantly prevents businesses from making informed and...
This research paper focuses on reengineering and optimization of energy consumption and other costs for large IT infrastructures, with support from EA software which is based on advanced use of IT Key Performance Indicators (KPIs) and powerful visualization solutions. Use of KPIs is crucial in achieving energy efficient, green IT, implementing these metrics allows the enterprise to determine areas...
A key feature of Cloud computing is its agility and flexibility to support the scalability needs of business solutions. Currently, the agility is only limited to the scalability of the compute, memory and storage. To improve an application's agility, we need to monitor & measure solution level metrics and associate the performance of the metrics to the business agility needs of the solution...
When planning a data center migration it is critical to discover the client's business applications and on which devices (server, storage and appliances) those applications are deployed in the infrastructure. It is also important to understand the dependencies the applications have on the infrastructure, on other applications, and in some cases on systems external to the client. Clients can only rarely...
Combining enterprise architecture and operational data is complex (especially when considering the actual 'matching' of data with enterprise architecture objects), and little has been written on how to do this. Therefore, in this paper we aim to fill this gap and propose a method to combine operational data with enterprise architecture to better support decision-making. Using such a method may result...
In the absence of legal authorities and enforcement mechanisms in open e-marketplaces, it is extremely challenging for a user to validate the quality of opinions (i.e. Ratings and reviews) of products or services provided by other users (referred as advisers). Rationally, advisers tend to be reluctant to share their truthful experience with others. In this paper, we propose an adaptive incentive mechanism,...
This paper presents a consice yet comprehensive description of a DSA-based Vehicle-to-Infrastructure (V2I) communication system operating under spectral scarcity conditions. Existing mathematical models for such a system overlook some but essential ones of its behavioural characteristics. Thus, these models' reported performance results seem to be unrealistically overoptimistic. In this paper, a simulation...
Providing optimal Quality of Service (QoS) for Cloud Services Delivery Networks (CSDN) is a challenging task due to the mutual-interference phenomenon among multiple applications. Existing approaches only provide best-effort services, which aim to maximize the number of served users and sacrifice service dependability. To enhance the service dependability, designs of allocating fixed bandwidth among...
Cloud infrastructure services offer elastic computing resources that particularly match the requirements of web transactional applications. Such applications, e.g., e-business applications, have high business value and variable workload patterns and therefore utilizing such elastic cloud resources in a cost-effective way is crucial need for cloud consumers. Defining economic elasticity rules, however,...
Cloud infrastructure should accommodate changing demands for different types of transactions with heterogeneous requests workload and response time constraints. The multi-layer nature of service computing results in the difficulty of designing an optimal cloud infrastructure. The objective of the paper focuses on enabling clouds infrastructure to provide guaranteed performance in minimum cost. The...
With the memorable start and massive adoption of cloud concepts, infrastructures and platforms, there is a paradigm shift in the IT landscape. That is, IT solutions and services are being developed, debugged, deployed and delivered from clouds to be conveniently consumed by global users via the open and public web. The point is that the web and the cloud resources are smartly combined and leveraged...
Through scoring vulnerabilities according to their risks, mastering statuses of vulnerabilities, security managers could adjust the configuration for computer security in time and give repair methods to different vulnerabilities flexibly. Since scoring vulnerabilities is significant for evaluating and repairing vulnerabilities, this paper presents a vulnerability scoring mechanism based on CVSS by...
E-commerce systems are typically QoS-sensitive, so QoS-oriented tunings of e-commerce servers are very important for such systems. However, existing e-commerce benchmarks are insufficient for supporting QoS-oriented tunings, because some critical QoS features of e-commerce systems cannot be precisely evaluated by them. One example of these features is the integrality of service, which is usually expressed...
Business metrics play a critical role in determining the best system-level configuration to achieve an organizational business-level goal. We present a framework for reasoning about business-level implications of malicious attacks affecting information technology (IT) systems that underlie various business processes. Through an exemplar web-based retail company scenario, we demonstrate how to quantify...
The paradigm shift from traditional on-premise software to a service based model has gained significant momentum in the past decade. One such concept, Software as a Service (SaaS), delivers the functionality of traditional on-premise software as a service over the web. While a defect or a malfunction in a traditional on-premise application may affect a single user, the affected user base in a SaaS...
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